1 // Test that registers of running threads are included in the root set.
2 // RUN: %clangxx_lsan -pthread %s -o %t
3 // RUN: %env_lsan_opts="report_objects=1:use_stacks=0:use_registers=0" not %run %t 2>&1 | FileCheck %s
4 // RUN: %env_lsan_opts="report_objects=1:use_stacks=0:use_registers=1" %run %t 2>&1
5 // RUN: %env_lsan_opts="" %run %t 2>&1
6 
7 #include "sanitizer_common/print_address.h"
8 #include <assert.h>
9 #include <pthread.h>
10 #include <sched.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 
14 extern "C" void *registers_thread_func(void *arg) {
15   int *sync = reinterpret_cast<int *>(arg);
16   void *p = malloc(1337);
17   print_address("Test alloc: ", 1, p);
18   fflush(stderr);
19 
20   // To store the pointer, choose a register which is unlikely to be reused by
21   // a function call.
22 #if defined(__i386__) || defined(__i686__)
23   asm("mov %0, %%edi"
24       :
25       : "r"(p));
26 #elif defined(__x86_64__)
27   asm("mov %0, %%r15"
28       :
29       : "r"(p));
30 #elif defined(__mips__)
31   asm("move $16, %0"
32       :
33       : "r"(p));
34 #elif defined(__arm__)
35   asm("mov r5, %0"
36       :
37       : "r"(p));
38 #elif defined(__aarch64__)
39   // x9-10 are used. x11-12 are probably used.
40   // So we pick x13 to be safe and x14 as a backup.
41   // (x13 known to be used on Ubuntu Focal)
42   asm("mov x13, %0\n"
43       "mov x14, %0"
44       :
45       : "r"(p));
46 #elif defined(__powerpc__)
47   asm("mr 30, %0"
48       :
49       : "r"(p));
50 #elif defined(__s390x__)
51   asm("lgr %%r10, %0"
52       :
53       : "r"(p));
54 #elif defined(__riscv)
55   asm("mv s11, %0"
56       :
57       : "r"(p));
58 #else
59 #error "Test is not supported on this architecture."
60 #endif
61   __sync_fetch_and_xor(sync, 1);
62   while (true)
63     sched_yield();
64 }
65 
66 int main() {
67   int sync = 0;
68   pthread_t thread_id;
69   int res = pthread_create(&thread_id, 0, registers_thread_func, &sync);
70   assert(res == 0);
71   while (!__sync_fetch_and_xor(&sync, 0))
72     sched_yield();
73   return 0;
74 }
75 // CHECK: Test alloc: [[ADDR:0x[0-9,a-f]+]]
76 // CHECK: LeakSanitizer: detected memory leaks
77 // CHECK: [[ADDR]] (1337 bytes)
78 // CHECK: SUMMARY: {{(Leak|Address)}}Sanitizer:
79